Abstract
This paper provides a novel approach for exploiting ω phase strengthening in a metastable β titanium alloy while retaining high ductility. The addition of 1 wt% Fe into our previously designed Ti-7Mo-3Cr alloy can efficiently control the growth of ω phase following air-cooling, resulting in a ultrahigh yield strength (Rp0.2of 1210 MPa) with large ductility (εf of 0.15). Microstructural analysis of deformed alloys showed that the growth of ω phase in the air-cooled Ti-7Mo-3Cr-1Fe alloy modified the deformation mechanism from {332} twinning and dislocation slip, in the water-quenched alloy, to localized dislocation plasticity in ω-void channels.
Original language | English |
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Pages (from-to) | 77-81 |
Number of pages | 4 |
Journal | Scripta Materialia |
Volume | 162 |
Early online date | 7 Nov 2018 |
DOIs | |
Publication status | Published - 15 Mar 2019 |
Keywords
- metastable beta titanium alloy
- strengthening
- yield strength
- ω phase